Knot subassembly is prevented moving back by crank of pumping unit round pin
ZHANG GUOQIANG, MENG XIANGGUO, QI YUMEI, LIU HAIXIA, YU XINGCAI, YANG LIN
Year of Publication 06.06.2017
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Year of Publication 06.06.2017
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Pressure measuring and dosing device for oil well mouth and using method thereof
JI JIN, FENG XUEPU, BAI YU, QI YUMEI, LI ZHI, FENG FENG, ZHANG JINBO, SU JIANBIN, LI JIAN, HUANG XINGHONG, JIA SHENGWEI, YU XINGCAI
Year of Publication 03.04.2020
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Year of Publication 03.04.2020
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A dredge for sample valve
SONG YONGKANG, DU LUNING, PAN HONGYONG, QIANG JUNLI, HAN WEI, YU XINGCAI, ZHENG HONGYAN, LIU YONGBAO
Year of Publication 03.04.2018
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Year of Publication 03.04.2018
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Oil wiper for pumping rod
QI YUMEI, MENG XIANGGUO, SHI YANBO, YANG FENGJIU, LIU HAIXIA, YU XINGCAI, YIN MEI, YANG LIN
Year of Publication 03.04.2018
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Year of Publication 03.04.2018
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Belt guard
FENG XUEPU, QI YUMEI, LIU HAIXIA, SU JIANBIN, LI JIAN, ZHANG JINBO, HU JIANPING, HUANG XINGHONG, JIA SHENGWEI, LI WENWEN, YU XINGCAI
Year of Publication 10.03.2020
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Year of Publication 10.03.2020
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Packing is got with ware
SONG YONGKANG, DU LUNING, PAN HONGYONG, QIANG JUNLI, HAN WEI, YU XINGCAI, ZHENG HONGYAN, LIU YONGBAO, CHEN MINGJUN
Year of Publication 05.02.2019
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Year of Publication 05.02.2019
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Dismantling device for framework oil seal
QI YUMEI, WANG LIXIN, LIU HAIXIA, ZHANG JINBO, LI JIAN, SU JIANBIN, HU JIANPING, HUANG XINGHONG, JIA SHENGWEI, YU XINGCAI, KANG SHAOLI
Year of Publication 08.11.2019
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Year of Publication 08.11.2019
Patent
Motor base
MENG XIANGGUO, GONG YANHONG, WANG LIXIN, NING LIJUN, YU XINGCAI, HAN WEI, WANG SHIQIAN, DENG BOHUI, LI GUOZHI
Year of Publication 31.08.2018
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Year of Publication 31.08.2018
Patent